This function used to be shared with the xxan decoder, but that is not
true anymore.

The background changes from 128 (used by the default/cmdutils
get_buffer()) to 0. This looks more correct.

Do not overwrite linesize set by get_buffer().

The last frame in the FATE test is not decoded anymore, since the file
is cut and a part of it is missing.

Fixes Ticket1999

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes the following warning with GCC:
    libavcodec/pthread.c:35:0: warning: _GNU_SOURCE redefined [enabled by default]
    <command-line>::0: note: this is the location of the previous definition

The reason of the presence of this flag is:
    % pkg-config --cflags sdl
    -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL

Signed-off-by: Paul B Mahol <onemda@gmail.com>

The description as updated in 6e5c44b0f made it sound like it is
handled exactly like the pts, which it is not. Clarify that it
is the packet that triggered returning the frame instead of just
the last avpacket (in case of frame threading, it won't be the
dts of the last packet).

Signed-off-by: Martin Storsjö <martin@martin.st>

The asm code is not valid for older compilers as it uses too many
operands, ICC on x86_32 seems affected by this.
This patch disables the affected code for ICC on x86_32 and should
make it compileable again.
A better fix would be to use fewer operands or to change this code
to yasm, later is being worked on AFAIK so this is a temporary
solution.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Remove some pointless comments and empty lines.

Fixes Ticket2041

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Using a frame count, as is done currently, does not work at all with
seeking. Instead, when the number of samples in the final frame has
been decoded, we check if only the 32-bit CRC is remaining. If so, we
assume that it is the final frame.

There is no longer a need to keep total_frames in TTAContext.

Beginning with version 1.5.1 openjpeg defaults to install its headers to
/usr/include/openjpeg-${major}.${minor} instead of /usr/include without
providing a compatibility symlink making the old test fail.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Improves the file from Ticket2050

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Sometimes the extradata has duplicate atoms, but that shouldn't prevent
decoding. Just ensure that it is at least 36 bytes as a sanity check.

CC: libav-stable@libav.org

Fixes Bug 402

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Also replace relevant bytestream2 functions with unchecked variants due
code that already checks for overreads.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

These are all part of splited out dsp utils from FFmpeg

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Code originates from:
910b9f30 libavcodec/dsputil.c            (David Conrad        2010-05-27 04:39:27 +0000  334) void ff_emulated_edge_mc(uint8_t *buf, const uint8_t *src, int linesize, int block_w, int block_h,
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  335)                                     int src_x, int src_y, int w, int h){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  336)     int x, y;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  337)     int start_y, start_x, end_y, end_x;
b5a093b3 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-25 20:22:36 +0000  338)
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  339)     if(src_y>= h){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  340)         src+= (h-1-src_y)*linesize;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  341)         src_y=h-1;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  342)     }else if(src_y<=-block_h){
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  343)         src+= (1-block_h-src_y)*linesize;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  344)         src_y=1-block_h;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  345)     }
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  346)     if(src_x>= w){
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  347)         src+= (w-1-src_x);
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  348)         src_x=w-1;
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  349)     }else if(src_x<=-block_w){
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  350)         src+= (1-block_w-src_x);
225f9c44 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-15 00:25:53 +0000  351)         src_x=1-block_w;
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  352)     }
93a21abd libavcodec/mpegvideo.c          (Michael Niedermayer 2002-07-14 18:37:35 +0000  353)
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  354)     start_y= FFMAX(0, -src_y);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  355)     start_x= FFMAX(0, -src_x);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  356)     end_y= FFMIN(block_h, h-src_y);
b8a78f41 libavcodec/mpegvideo.c          (Michael Niedermayer 2002-11-10 11:46:59 +0000  357)     end_x= FFMIN(block_w, w-src_x);

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It breaks some opaque samples.

This reverts commit d4fdaafdb7.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

This fixes the colour of the transparent background (as seen with ffplay),
and makes the background of some non-keyframes transparent that was
incorrectly shown as opaque for some samples.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Across the many retouches those did not make the main commit.

Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

These where reduced in f1d8763a02
and this change can cause out of array accesses.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CVE-2012-2803.

CC: libav-stable@libav.org